JAK2 regulates paclitaxel resistance in triple negative breast cancers
| Autor: | Woohang Heo, Hyeong-Gon Moon, Deukchae Na, Jihui Yun, Kyu Jin Lee, Jongmin Han, Jong Il Kim, Songbin Li, Hye Youn Son, Jaeyong Choi, Ju Hee Kim, Charles Lee, Wonyoung Kang, Han Suk Ryu, Ji Gwang Jung, Dong Young Noh, Mingji Quan |
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| Rok vydání: | 2021 |
| Předmět: |
Paclitaxel
Cell Triple Negative Breast Neoplasms Mice chemistry.chemical_compound Cancer-Associated Fibroblasts Downregulation and upregulation Cell Line Tumor Nitriles Drug Discovery Tumor Microenvironment medicine Animals Humans Genetics (clinical) Triple-negative breast cancer Tumor microenvironment Chemistry Mammary Neoplasms Experimental Janus Kinase 2 Cell cycle Antineoplastic Agents Phytogenic Molecular medicine Gene Expression Regulation Neoplastic Pyrimidines medicine.anatomical_structure Drug Resistance Neoplasm Cancer cell Cancer research Pyrazoles Molecular Medicine Female hormones hormone substitutes and hormone antagonists |
| Zdroj: | Journal of Molecular Medicine. 99:1783-1795 |
| ISSN: | 1432-1440 0946-2716 |
| DOI: | 10.1007/s00109-021-02138-3 |
| Popis: | We investigated the molecular mechanisms of paclitaxel resistance in TNBC using seven patient-derived xenograft (PDX) models and TNBC cell lines. Among the seven PDX models, four models showed resistance to paclitaxel. Dysregulation of JAK/STAT pathways and JAK2 copy number gains were observed in the four paclitaxel-resistant PDX tumors. In TNBC cell lines, silencing the JAK2 gene showed a significant but mild synergistic effect when combined with paclitaxel in vitro. However, JAK1/2 inhibitor treatment resulted in restoration of paclitaxel sensitivity in two out of four paclitaxel-resistant PDX models and JAK1/2 inhibitor alone significantly suppressed the tumor growth in one out of the two remaining PDX models. Transcriptome data derived from the murine microenvironmental cells revealed an enrichment of genes involved in the cell cycle processes among the four paclitaxel-resistant PDX tumors. Histologic examination of those PDX tumor tissues showed increased Ki67-positive fibroblasts in the tumor microenvironment. Among the four different cancer-associated fibroblast (CAF) subtypes, cycling CAF exhibiting features of active cell cycle was enriched in the paclitaxel-resistant PDX tumors. Additionally, fibroblasts treated with the conditioned media from the JAK2-silenced breast cancer cells showed downregulation of cell cycle-related genes. Our data suggest that the JAK2 gene may play a critical role in determining responses of TNBC to paclitaxel by modulating the intrinsic susceptibility of cancer cells against paclitaxel and also by eliciting functional transitions of CAF subtypes in the tumor microenvironment. KEY MESSAGES : We investigated the molecular mechanisms of paclitaxel resistance in TNBC. JAK2 signaling was associated with paclitaxel resistance in TNBC PDX models. Paclitaxel-resistant PDX tumors were enriched with microenvironment cCAF subpopulation. JAK2 regulated paclitaxel-resistant CAF phenotype transition. |
| Databáze: | OpenAIRE |
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